<template>
  <div class="NoticeListBox">
    <ul
      class="noticeList"
      :style="{ top: top + 'px', transition: `top ${animateTime}s` }"
    >
      <li v-for="(item, index) in notices" :key="index">
        <a href="#">{{ item }}</a>
      </li>
      <li>
        <a href="#">{{ notices[0] }}</a>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  name: "NoticeList",
  props: {
    notices: {
      type: Array,
      default: []
    }
  },
  data() {
    return {
      top: 0,
      height: 40,
      animateTime: 1
    };
  },
  mounted() {
    setInterval(this.topAnimate, 3000);
  },
  destroyed() {
    clearInterval(this.topAnimate);
  },
  methods: {
    topAnimate() {
      if (this.top <= -this.notices.length * this.height) {
        this.top = 0;
        this.animateTime = 0;
        return;
      }
      this.animateTime = 1;
      this.top -= this.height;
    }
  }
};
</script>

<style scoped lang="less">
@import "../assets/css/var.less";
.NoticeListBox {
  height: 40px;
  overflow: hidden;
  position: relative;
  display: inline-block;
  width: 240px;
  .noticeList {
    width: 100%;
    position: absolute;
    left: 0;
    li {
      width: 100%;
      height: 40px;
      line-height: 36px;
      a {
        color: @thirdColor;
        text-decoration: underline;
        font-size: 12px;
        &:hover {
          color: white;
          text-decoration: none;
        }
      }
    }
  }
}
</style>
